using System;

class Program01 {
		static void csinal2(ref int a) {			
			a = 2;
		}
		static void csinal3(out int a) {			
			a = 3;
		}
		static void Main() {
                   	int b = 0;
                        int c;

			csinal2(ref b);
			Console.WriteLine(b);
			csinal3(out c);
			Console.WriteLine(c);
		}
}